earlier unfinished electronic piece by ligeti. not musically related, but did develop some of the same concepts (sound masses)

Sound masses

Ligeti. Music that concetrates on more or less indeterminate clouds of sound built on complete verical collections of the 12 tones.

later ligeti developed

a language of microtonal clusters.

ligeti first introduced microtonal clusters

independently but at the same time as xenakis, pendercki, and stockhausen

ligeti gained international reputation from

apparitions

apparitions lead ligeti to a more

homogenous and static handling of orchestral clusters in atmospheres, either in sustained tones or in micropolyphony

micropolyphony

ligeti. dense weaves of unison canons in which the lines move at different speeds and are not separately identifiable.

micropolyphony

ligeti: "the complex polyphony of the individual parts is embodied in a harmonic-musical flow, in which the harmonies do not change suddenly but merge into one another; one clearly discernible interval combo is gradually blurred, and from this cloudiness it is possible to discern a new interval combination taking shape."

ligetis clusters drift through

regions of color, harmony and texture

kaufmann said ligeti

thought of a representation of mass for the dead, as though far below, in the remote distance, a requiem were taking place."